While Mr Littlejohn in no way considers himself royalty, he says the links to Princess Diana were good for a laugh every now and then.

'My mum and dad moved to a place in rural NSW. When I told him, he started calling himself the laird of the area,' he said.

'Being eight generations away... basically everyone is connected to the royal family. If you dig around far enough thereís usually a link.'

Ancestry content director Ben Mercer said the number of Australians who would be linked to royalty way back in their family trees would be high.

'The further you go back in Australia's history and family history the closer everyone becomes. It becomes more and more likely that you have connections to royalty,' Mr Mercer said.

'We have 16 billion records... it extends back in to the United Kingdom and Europe. You can look for your ancestors in the UK census data.

'You can look for ancestors that have titles. If you do have a family name that is the same as a Great Britain town, it's possible they had a property in that area and royal connections because of that.'